Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
ScreenTray - A better way to capture, annotate and share screenshots
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Marker.io for Slack - Turn screenshots into Slack messages ✌️
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Weava - Workspace to highlight, organize & collaborate on your research articles.